dt-bindings: arm: qcom: document SM8650 and the reference boards

Document the SM8650 SoC and based MTP (Mobile Test Platforms) and QRD
(Qualcomm Reference Device) boards.

Reviewed-by: Krzysztof Kozlowski <[email protected]>
Signed-off-by: Neil Armstrong <[email protected]>
Link: https://lore.kernel.org/r/[email protected]
Signed-off-by: Bjorn Andersson <[email protected]>

Author: superna9999

Documentation/devicetree/bindings/arm/qcom.yaml

@@ -87,6 +87,7 @@ description: |
         sm8350
         sm8450
         sm8550
+        sm8650
 
   The 'board' element must be one of the following strings:
 
@@ -1039,6 +1040,12 @@ properties:
               - qcom,sm8550-qrd
           - const: qcom,sm8550
 
+      - items:
+          - enum:
+              - qcom,sm8650-mtp
+              - qcom,sm8650-qrd
+          - const: qcom,sm8650
+
   # Board compatibles go above
 
   qcom,msm-id: